Fluid-operated tool.



L. jw. GREVE.

FLUHB OPER/USD TOOLl APPUCATION HLED NOV.19,191&

Patented Apr. 13, 1915.

Sfmm/ WW n j MW vv T @by :kiwi @m INVEN OR Louis W. @i5-svn, osonnynnnun anni/"mmm nocif, omo.

Be it known thu Louis YW. GREVE, :i citizen of the United Staes,residing ut Clevelanch' in the county of Cuyahoga and Stute of Ohio,have invented ceruin new und useful inproyeniens in FluicllporaieclTools, oi' which 1Lhe following is u. specificotion.

rhe invention relates to 'luicl operated tools or machines, unilparticularly to fluid operated roch drills. Thev invention has for itsprimary obje-ct the provision oi' a. simplified structure for securingthe results as set forth in my application Serial No. .792,700,

liled '()Ctolier l, .W12-; ln the the said npijllicution the soppogo ofhammer piston.. while 'ht-ing a ou* oi' nii? through he uli. drillrotating meins admission oi' nir valve) to one. Valve. whereh hohl inone ent invenion c suine resul; by tl struct-uro oA of ino ement.

e My 'i i neinphxes securing io u. oi' i siinplii'ieo rangement. Brieflynecl, this is ne plished hy doing :infxy Wiih the passage is eut of?,hus poppin" the. movement or tho hunnner pi` on fino innin valve,,'ahile permitting n continuous Flow of si? to the drill rotating Inennsand to the front envi of he cylinder und through the hollow drill steel.One embodiment of the invent-ion is illustrated in the accompanyingdrawing, Wherein- Figure l is a longitudinal section through the machinewith the operating parts there of in one position, F' 2 is n similarlongiuflinul seoon hro i. u porion of 'he ino/chine, i il r paris En theo schon ut the throle waive,

in a position diieren through he machine. howing such thro'tlo roin thatof Figs. l

wry

' controlling vulve for coni 1s l nonrotatably iih seniion and si ablyhut inff piston for seeuri ,fr The sen-h *op 1oor 'n sieg-o ,oprofgntion of he rntrhe; wheel il and the chuck S upon vhioh ii isnioun-ed. This meohonisni for securing the step-by-sep rotation of thechuck and drill .st-*fel is shown. described and claimed in inyzo-pending upplicnion Serial No. 7S', filed August l2, 1913, ind nodetziled eizplonuion or claim Witlig 'espee to this struoure is therefre made., n the present application. The hammer pison 2 is Controlledfrom faire s3 which reoiprocoies and alten in ely zuin'ns pressure. liothe opposite ends of the. pison heinzner o soeurs iis recipro- Cntion.Suhsnninlly he rohre mechanism iwi arrangement of porfis lor securing'the reoiproczilion of the hnnnner piston is disclosed in ,thopnent tolinhnrds No. 929,111 of July 27th, 190), und no Claim is made for thisspeoiiic mechanism or arrangement 'of ports. In view of the fact ihziithis mechanism is a part of the' prior nrt and fully disclosed in thepaient to Richards, only sulioient explanation of such iineehanisin'wili he made in 'the pre-sent applieition is necessary to anunderstanding of my invention and improvement to he luier explained. Therelation of the yu 5 '-(l l .l i he. inos roziilj; 'unsoription oi heirop hns-.nin

rei piston l exhaust passage 26.

'pressure from thelthrottle valve Sis admittedthrough the passage 12a,.passesfthrough the passage 13 in the plug 14, andl thence 18 andpermits a supply of air from the inclined' passage 15 to the left handvend of the hammer piston, via the groove and passage 25, so. thatpressure is applied to 'l' ie same distinction exists with respect 'tothe exhaust from the rear'side .of the piston hammer 2. 'When thepistonhammer moves to the left vfrom its position as indicated in Fig. 1, apartof' various positions to which it is turned, the

through the inclinedpassage 15' to. the the exhaust escapes into thepassage 26 via 7'0 groove 16 in the valve cylinder, thence 'to theshortpassage 29, While another portion the groove 17, and nallyto thefront side othe exhaust escapes into the same passage ofthe hammerpistor via the passage"1'8-.- 26 via the passage 25, grojove 2&1, groove1 l At this time pressure is vbeing supplied, to and passage 3 2.l ItWill be seen that t is the chambers 19 and 2Oat opposite ends of latterexhaust arrangement differs from that 75 the jvalve 5, through thepassages 21,'a'nd22, of my application 792,700 in -that in such thepressure in the chamber-.19 being greater application' the 'exhaustvfromj the groove 241 than that in the chamber 20-loyI reason of thepassesy` -through the adjacent opening orT fact/that the passage 21 islarger than the passage n the top of the valve casing in` endof ythepassage. 22 leading into the stead of passing downto ,the passage, 26.;so chamber 20,- there' being a constant diss The main distinctiontherefore overthe 'ap-, v

charge from eacho chambers through the paratus of my prior; applicationresides i small passages indicated at the upper sides the fcht all 0fthe 6311311312 With thE eX, of ,the chambers, The passage 21 has twocept-i011 .bf- What Passes through the. 'dlll 20 openings 48`and 441into thecylinder. e steel flows lthrough'the passage; 26 to the at; Whenthe'piston2 moves-to the rear as rear of the machine fandout pasa theindicated in Fig. 2,'it covers the end of the, thrpttlevelve,Whereas-.,111 the prior appli?v passage'21and the groove 22. The cover-0&1'11011 Only a 'Part 0f the @Xheut escapesl ing of the end of thepassage- 21 cuts oli" the through the passage 26, the. remalndenthere-25 supply o f pressure to the chamber 19 at the O f escaping through theholes or, perfora'f .so

cud,v ot the valve 5, s o that. the pressure tlons ln'thevalve casmg 4above the mais, drops in! this chamber, while the coveringv v alve 5-vA's a, result the exhaust'can be en -1' of the groove 22 causes anincrease in the tlrely controlled from the throttle valve 6, .chamber20, such increase being due to the Whwh result Could not beaccompllshedln f fact.that the? groove is supplied with air thestructure of 4my pr10r apphcat1on. e5 from the inclined passage 15, Vbymeans of The throttlevalvef as illustrated lll F1g, the passage 23. Thevalve is thus moved 3 COIllStS 0f a hQHOW tlPeIlllg Plug held, i to' theloft tothe position indicated in Fig. upon-lts Seat by tur pressure andprovlded'. 2. This movement to theleft of course cuts Wlth R. handl 33?ball 34 fits. H1 1130658.92 35 off the supply of air through the passage1n .the plate 35 'earned by the hanleiand 10o serves to maintain'thevalve yieldingly in'` hall 34 being spring held as illustrated, and

constituting aT construction Well known in 40 move thepistonto theright. lhe movethe art.' f 105 ment of the piston to thepositioniindicated The throttle valve has tl1ree main. posiin Fig. 2uncovers the end of the exhaust t10I1S,the first 0f vvhloh 1sillustrated in Fig. passage 26`such exhaust passage leading to 4, the-second 1n Fig. 1, and the third in Fig.

the rear end 'of the machine and having its 2.v l/Vllen the valve 1s inthe position 1llusrear end, open in the normal operation of trated 1nFig 4 the apparatus is out of op` 110 the apparatus. f'". eration, sincethe passage 36 leading to the As the piston hammer 2 moves tothe right drill steel rotating piston 9 1s blankedJ and from the position of Fig. 2exhaust occurs Since the passage/3 7 through the pl1'. out from thefront side of the piston via the of registration with the passage l 1:2So

- passage 26 and via the passage 18, groove that'no air isbeiug admittedto operatethe 115 17, groove 27, and passage 28, such passage hammerpiston 2. r

leading into the passage 26, so that all The position of the throttlevalv e 6 as of the exhaust from the front sido of the` lllllsl'td HlFlgl'lS tllelsual running popiston passes to the rear through thepassage Sltwn. vWhen. the valve 1s 1n this posltipn 26,' with theexception of acer-tain amount the passage '37 registers with the passage1-20 which passes through the drill steel'as here- 12a, admitting fluidto operate'the hammer inafter set forth. It will be seen that in plston,and the passage-38 through the Wall the matter of the exhaustarrangement for of the valve indicated. 111 dotted lines 1s m* the frontend oli the piston the structure registration ujith the end of thepassage 3 6,

"E0 difersfrom that'fl'of my application 792,700 so that iiuidjsadmittedto operate the drili 1243" wherein ythe exhaust flowing through therotating pistonf 9. ht this time also the expassag'e 18 to the groove 17escapes through haust passage 2G is in regtstratlon with the a hle lin.the valve fcasiug, adjacent the groove 39 extending longitudinally ofthe v'groove 1,7, instead of passing down to the Wall of the valve 8 asindicated indotte-:l

" lines in Figs.' 1 and @ne end otthis 130 with me ends of the passages12a and 36, so t the operation to he expected is the same .s when thevalve is in the position ot F ig.

The result is the saine in so far as the opration of the hainnier piston2 is concerned, or the reason that when the Valve G occupies positionindicated in 2 the grows .32) is out otreistration with the end ot theeX aast passage 2G, and such eX- h i. t ssage 2G is hlanlred, thustrapping tl e the cylinder and preventing the the hannner piston. Atthis lve 5 will he held in the right ion indicated in Fig. l, at suchittii lluid pressure continuouslyv side ont the hannner piston with ausn through the usual pase anvil and drill steel, ton assumes the thevalve 5 is hand position, il is uncovered, admitting )ly air to thechanicer l!) the pressure received in the chaniher iroin the groove Itwill he seen that the pressure to the right of thc hainnier piston underthese conditions with the exhaust closed is hieher than is the case inthe normal operation o the machine with ne exhaust open, so that thepressure sup- 'frein the port 4a to the chainher 19 is lian in thenormal operation of the in the normal operation of the .*ith the erhaustopen and with the animer piston in tie position of Fig. f2, the ressuresupplil to tli :hanxher 19 at the el't o: the Valve hy reason of theport Ll-ll inconsernicntial, so that the pressure troni ie groove 22 issul'licient to hold the Valve f in its left hand position as heretoforeinicated,

lt will he seen from the foregoing that hy moving the throttle valve tothe position in dicated in Fig. 2 the movement of the hammer piston isstopped While still permitting a discharge of air to the front side ofthe piston hammer and through the drill steel, While still permitting adischarge of air through the passage 36 to the drill rotating It willalso he seen that-the stoppe ot the piston hammer under the conditionsspecified is secured entirely hy exhaust, thus distinguisli application.

from the operation in my application 792,700 referred to wherein anadditional passage 3l was employed, leading to th chamber 19 andcontrolled hy the throttl faire in order to secure the maintenance otthe valve 5 in its right rhand position When it Was desired to stop thepiston hammer. ln my present construction l avoid the necessity orn thisadditional passage, hy arranging the exhaust passages and ports in sucha manner that all of the exhaust with the exception of what passesthrough the drill steel is directed through the passage 2G controlled hythe throttle valve, instead of allowing a portion' of this exhaust toescape through the top wall oi the valve chamber as is done in theconstruction or' my prior 7While the result achieved' is the saine in sofar as the stoppage of the hainnier piston is concerned, the presentarrangement is simpler, and the number ot ports passages in the throttleYvalve and the Walls oi? the cylinder is reduced. Other advantagesincident to the modification will oe apparent to those skilled in theart.

lt will he understood that the principle of invention involved is etbroad application and not limited to the particular type of apparatusshown, but contemplates any and all apparatus wherein the stoppage ofthe piston is secured hv means el' throttling the exhaust. Forcomenicnce, the throttling or hlanlring ci the exhaust is preferablyaccornplished by means of the throttle valve, but it will he understoodthat this is not necessarily tie case, although the arrangementillustrated is the preferred one.

lli/That l claim is;

l. In combination in a fluid actuated niachine proif'ided'with acylinder, a hammer piston in the' cylinder, ieans for securing theautomatic reciprocation of the piston with the alternate application ofliuid pressure to the opposite ends of the hannner piston, exhaustpassage means through which substantially all of the exhaust from therear side or he piston haininer passes, an exhaust pas.J directed to theliront leading troni the front side of the piston Lammer, and a throttleValve which in one position blanks the said exhaust passage meansleading from the rear side oic the piston hainnier and thus stops themovementof the piston hainnier and at the saine time admits fluidpressure to 'the front side of the piston hammer.

2. In combination in a fluid operated drilling machine provided With acylinder' and a drill steel With a passage therethrough, a hammer pistonin :the cylinder, means 'for securing the automatic alternateapplication of i'iuid pressure to the opposite ends of the hammerpiston, exhaust passage lmeans through which substantially all of theexhaust from one side of the ilo piston, While still permitting a flowof tluid hammer piston passes, a communication v'from the other side rofthe hammer piston to the passage through the drill,i steel, and athrottle valve which in one position blanks the said exhaust passagemeans and at the 4same time admits 'iiuid pressure continuously to the,iotherside vif the hammer piston and through the drill steel.

3.A In comh'n'ation fin a fluid operated drilling vmachine provided1with a cylinder, a drill steel and fluidA operated means for rotatin,the drill steelha hammer piston .in y

the cylinder, means'for securing the au'to- -matie alternate applicationof fluid pressure to the opposite ends of the hammer iston,

V exhaust passage means through whici suhstantially allfof the exhaustfrom one side o f the hammer. piston passes, a Asupply passage. leadingAto the said fluid operated means for rotating the drill steel, andmeans whereby Athe said exhaust passage means may be blanked, .thusstopping the hammer leading to the said Huid operated means for rotatingthe drill steel, and a throttle valve A.arranged so that in one oitspositions the sureis supplied 'throughthe said supply pas# said exhaustpassage means are blocked, stoppingv the hammer piston, While fluidpressage te the'drill rotating means;

A5. In -combinationin---a fluid operated drilling machine provided witha cylinder, a drillsteel-With a passage therethrough, a hammer piston,and a main valve controlling the,alternate,application of fluid pressureto the 'oppositesides of the ham-I1 merpiston and -the exhaust from suchsides, exhaust passage means receiving exhaust eseapirig past the saidmain valve from' one s ide of the said piston, and a throttle valveadapted to hlanlrthesaid exhaust passage means 4thus stopping. thehammer piston While permitting'a flow of fluid pressuretothe other sideof the vhammer p iS'-- ton and thence through the drill/steel.i 6.' Incombination in a fluid Loperated a drill steel with a passagetherethrough,

ldrilling machine provided with a cylinder,L

a hammer piston, and a main valve ycontrolling the alternateapplicationJ of 'pres-l* sure'to the opposite sides of the h mne'rpis-1' ton and the exhaust from suoll'si esexhaust passage meansreceiving exhaust escaping' past` the said main valve from both sides ofthe hammer piston, the fluid pressure st the` front side of thehammerpiston also vexhausting partially. throughthe" d rlll steel1 and a.throttle Valve adapted to -blankthe' said exhaust passage meansthusstopping the hammer piston 'While permitting alow;

of fluid pressure to the other side of .the hammer piston and thencethrough the drill]` steel.

7: In combination in a uid :operated 'drilling machineprovided Withlacylinder,

a hammer piston, a drill steel, fluid operated means for rotating thedrill steel and a main valve for controlling the alternate applicationof Huid p'ressure'to the. opposite sides of the hammer piston and Ltheexhaust from n such sides, exhaust passage means receiving the exhaustIescaping past the said main valve from one side of the said piston, and'means i'or blanking lthe said exhaust passage means and thus stoppingthe hammer l iiston while-fluid pressureis being supplied to the saidldrill rotating means. i 8. In combination in a .iiuid operated 'so idrilling machine provided with a cylinder, a hammer piston, Ia drillsteel,.luidoperated means for rotating the drill steel and a main. l

valve for v*controlling the alternate application of llfuidpressure tothe opposite sides:

of the hammer piston and the exhaust from the exhaust escaping past thes aid main valve from both sides of the said piston, and meansforblankmg the said exhaust vpassage means and thus stopping the hainsuchsides, exhaust passage means receiving mer piston while fluid pressurelis being sigpv plied to the said drillrotating means.A-

In testimony whereof I have hereunto signed my name in the .presence ofthe two subscribed witnesses. A

LOUIS GREVE. Witnesses;l c

Gno. H. HALL, J. DE Meer".

